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Search: Posts Made By: momaka
Forum: Troubleshooting Power Supplies and Power Supply Design Today, 01:32 AM
Replies: 10
Views: 989
Posted By momaka
HiPro HP-P3017F3 - cap list v2

Below I'm re-posting an updated list of the caps found in this power supply.
This time, I will omit the brand and series in most cases, since these HiPro PSUs seem to use a mix of Teapo SC, Ltec...
Forum: Troubleshooting Power Supplies and Power Supply Design Today, 12:23 AM
Replies: 10
Views: 989
Posted By momaka
HiPro HP-P3017F3 rev:03 [Dell H057N] - recap v2 & 3LF models

And here's that:
https://www.badcaps.net/forum/attachment.php?attachmentid=224775&stc=1&d=1606803639
Right... so the recapped PSU needed a recap. :D
The 4700 uF cap on the 5V rail was bulging and...
Forum: General Capacitor Questions & Issues Yesterday, 10:57 PM
Replies: 58
Views: 5,085
Posted By momaka
Re: Panasonic FC series - leaking? quality gone?

PR for sure. I've seen many leak from the bung on old equipment.
PL seems to have fixed that, but they may still be not old enough to tell. So far so good, though.

PS is OK, IME.
PM, I've seen...
Forum: General Computer & Tech Discussion Yesterday, 09:07 PM
Replies: 16
Views: 585
Posted By momaka
Re: Booting from USB3.0 PCI-E card?

Oh, I see now. That M2N-E has one of those heatpipe'd chipset heatsinks, where the heatpipe runs to some fins back over where the CPU VRM is (and is also used to "cool" the CPU VRM. :rolleyes:...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 11-29-2020, 10:59 PM
Replies: 5
Views: 113
Posted By momaka
Re: Pegatron M2N78-LA (rev. 3.02) freezes on POST with SATA drives attached

Cool, thanks for your input, piernov!
I guess I should have asked before trying to reflow it, though I imagine I didn't hurt anything given the temperatures reached.
This also gives me a bit more...
Forum: Troubleshooting Audio Equipment 11-29-2020, 10:26 PM
Replies: 143
Views: 2,094
Posted By momaka
Re: Mackie CR4 amplifier no sound

No problems! :smile:

Rubycon YXF is actually one of the most entry-level low-ESR series, so it is better than regular GP caps. Better yet, it's still rated for long life (5000 hours for 16-100V...
Forum: General Computer & Tech Discussion 11-29-2020, 09:39 PM
Replies: 4,739
Views: 753,392
Posted By momaka
Re: best cheap/free scores 1.1

I got a MSI Radeon HD5770 "Hawk" 1GB DDR5 video card about a month ago. Was a super-cheap eBay score (under $10 shipped) sold for parts / repair.

When I got it and tested it in my usual AsRock...
Forum: Troubleshooting Power Supplies and Power Supply Design 11-29-2020, 09:20 PM
Replies: 9
Views: 252
Posted By momaka
Re: KDMPower MIPC MI-X8775CD [PCB WF-C rev:E]

Yeah, you're right. I should have said it differently. Those parts were indeed the best back when they came out... but today they aren't. Of course, they are still more than good enough, so that's...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 11-28-2020, 11:08 PM
Replies: 5
Views: 113
Posted By momaka
Question Pegatron M2N78-LA (rev. 3.02) freezes on POST with SATA drives attached

Like the title says, I have a Pegatron M2N78-LA (HP P/N: 513430-002) motherboard out of an HP Pavilion PC. The motherboard hard-locks during POST when it gets to the part of trying to detect the SATA...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 11-28-2020, 10:59 PM
Replies: 12
Views: 397
Posted By momaka
Re: DELL Precision 490 Motherboard RAM issue

That's OK. As long as you soldered the new caps well on there and preferably with as short leads as possible. But more importantly, make sure electrolyte didn't leak from the old caps on the board...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 11-28-2020, 10:50 PM
Replies: 18
Views: 572
Posted By momaka
Re: ASUS P5GC-MX - No memory, no boot

Give me a day or two, and I'll try to make you a diagram with the rails.

In general, though, that bigger toroid/inductor by the RAM slots is your RAM V_dd/V_ddq rail... or sometimes called V_dimm...
Forum: General Computer & Tech Discussion 11-26-2020, 10:49 PM
Replies: 19
Views: 385
Posted By momaka
Re: Windows XP EoL Security Rollup...or similar?

You can... with the latest/last Firefox ESR (52.9, if I'm not mistaken.) But since that is also rather outdated now, there are indeed a few web pages that don't work correctly. For the most part,...
Forum: General Computer & Tech Discussion 11-26-2020, 12:33 AM
Replies: 19
Views: 385
Posted By momaka
Re: Windows XP EoL Security Rollup...or similar?

Hi! :D

Yes, it's slow to browse modern web on a P4 machine today. At least mine (still main PC) is somewhat newer P4 with Prescott HT CPU (that good ol' Optiplex 170L.)

Anyways, all I can say...
Forum: General Capacitor Questions & Issues 11-25-2020, 07:56 PM
Replies: 6
Views: 1,331
Posted By momaka
Re: Another custom C(r)apXon in FSP unit!!

Well, fortunately I don't have any Su'scon caps in stock (not new anyways... and the old ones I have are for testing stuff only if they're still in spec.)


Lol, that 3D render intro was trippy -...
Forum: General Electronics Technical Discussion 11-25-2020, 05:35 PM
Replies: 11
Views: 2,192
Posted By momaka
Re: Tech Tutorial: Choose the correct capacitors for reliable automotive applications

That's a pretty good idea.

Actually, a lot of appliances with heaters inside (like your clothes iron, for example) already have thermal switches like that. The idea is that in case the bi-metallic...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 11-24-2020, 01:04 AM
Replies: 17
Views: 403
Posted By momaka
Re: Asrock X79 Extreme4 trace cut

Well, which pins exactly measured 000.5 Ohms?

Remember, we are trying to help you troubleshoot without seeing what you're seeing exactly. So more info/details is always helpful. Pictures too, if...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 11-24-2020, 01:00 AM
Replies: 12
Views: 397
Posted By momaka
Re: DELL Precision 490 Motherboard RAM issue

For contacts on RAM sticks - use pencil eraser to clean until shiny again. After this, wipe with IPA to remove any possible leftover rubber residue.

For RAM slots: IPA and toothbrush may help......
Forum: Troubleshooting Computer Displays 11-24-2020, 12:55 AM
Replies: 4
Views: 160
Posted By momaka
Re: AOC E2470SWHE No power

There's no APFC circuit on the PSU in the pictures shown above. So 320V is correct.
Forum: Troubleshooting Power Supplies and Power Supply Design 11-24-2020, 12:19 AM
Replies: 9
Views: 252
Posted By momaka
KDMPower MIPC MI-X8775CD [PCB WF-C rev:E] - the autopsy results

OK, since I do think I am going to end up fixing this PSU... first thing that needs taking care of is the blown components on the primary.

Before removing anything, though, I decided to draw a...
Forum: Troubleshooting Power Supplies and Power Supply Design 11-23-2020, 11:07 PM
Replies: 9
Views: 252
Posted By momaka
Re: KDMPower MIPC MI-X8775CD [PCB WF-C rev:E]

Well, you CAN build a half-bridge PSU with MOSFETs too... or probably just about any switching device, if designed accordingly. That goes for other topologies too.

Here is, for example, one...
Forum: General Electronics Technical Discussion 11-23-2020, 09:43 PM
Replies: 11
Views: 2,192
Posted By momaka
Re: Tech Tutorial: Choose the correct capacitors for reliable automotive applications

Hey, that sounds like a new method of circuit protection. Just install a thermistor or whatever else with leaded (or maybe even low-melt temperature solder) and if it desolders itself, the device ran...
Forum: General Computer & Tech Discussion 11-23-2020, 09:39 PM
Replies: 16
Views: 585
Posted By momaka
Re: Booting from USB3.0 PCI-E card?

Well, glad to hear you got it resolved. :)
Forum: Troubleshooting Power Supplies and Power Supply Design 11-22-2020, 08:36 PM
Replies: 12
Views: 709
Posted By momaka
Re: What's this transformer for and how to find in on aliexpress?

^ Larger wire is OK - if you can make it all fit.
Smaller wire... will probably work too, but may not be a good idea.
Since this is not a power transformer but rather just a signal/driver...
Forum: Troubleshooting Computer Displays 11-21-2020, 02:36 AM
Replies: 4
Views: 160
Posted By momaka
Re: AOC E2470SWHE No power

Check big resistor R903, located next to switch IC (U901). R903 should show a low resistance. If it's open-circuit, U901 is probably bad.

Also I see an overheated ground trace between J903 and...
Forum: Troubleshooting Computer Displays 11-21-2020, 02:22 AM
Replies: 5
Views: 270
Posted By momaka
Re: VW224T ASUS Capacitor values replacements

The green vertical line is failed tab bond between TFT matrix and T-con board or TFT and flex IC. You can try pressing on the tab bonds on the t-con where the green vertical line is... but if it...
Showing results 1 to 25 of 500

 
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